Add comment explaining zh-Hant ICU vs NLS behavior difference

Co-authored-by: tarekgh <10833894+tarekgh@users.noreply.github.com>

Author: Copilot

snippets/csharp/System.Globalization/CultureInfo/DisplayName/getcultures.cs

@@ -43,5 +43,7 @@ zh      zh  zho CHS Chinese                                  Chinese
 zh-Hans zh  zho CHS Chinese (Simplified)                     Chinese (Simplified)
 zh-Hant zh  zho ZHH Chinese (Traditional)                    Chinese (Traditional)
 
+Note: zh-Hant returns ZHH when using ICU (default). When NLS mode is enabled, it returns CHT.
+
 */
 // </snippet1>

snippets/visualbasic/VS_Snippets_CLR_System/system.Globalization.CultureInfo.GetCultures/VB/getcultures.vb

@@ -39,6 +39,8 @@ Module Module1
 'zh      zh  zho CHS Chinese                                  Chinese                                 
 'zh-Hans zh  zho CHS Chinese (Simplified)                     Chinese (Simplified)                    
 'zh-Hant zh  zho ZHH Chinese (Traditional)                    Chinese (Traditional)                           
+'
+'Note: zh-Hant returns ZHH when using ICU (default). When NLS mode is enabled, it returns CHT.
 
 End Module
 ' </snippet1>